Given the attached data. Answer the following questions for a $4$ period moving average.

MAD$=$ Average $(|A-F|)$

$TS\frac{?}{S}=UM\frac{A-F}{M}AD$

MSE $=$ Average $(A-F{)}^2$

Compute your forecast for period $51.$

The potential answers are:

A: $5790\mathrm{.}25$ units.

B: $7837$ units.

$5875\mathrm{.}75$ units.

D: $8176\mathrm{.}5$ units.

E: $4507\mathrm{.}63$ units.